<template>
  <div class="list" ref="wrapper">
    <div>

      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.currentCity}}</div>
          </div>
        </div>
      </div>

      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div class="button-wrapper"
               v-for="item of hot"
               :key="item.id"
               @click="handleCityClick(item.name)"
          >
            <div class="button">{{item.name}}</div>
          </div>
        </div>
      </div>

      <div class="area" v-for="(item,key) of cities" :key="key" :ref="key">
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list"
             v-for="innerItem of item"
             :key="innerItem.id"
             @click="handleCityClick(innerItem.name)"
        >
          <div class="item border-bottom">{{innerItem.name}}</div>
        </div>
      </div>

    </div>
  </div>
</template>

<script>
  import Bscroll from 'better-scroll'
  import {mapState,mapMutations} from 'vuex'
    export default {
        name: "CityList",
        props:{
          hot:Array,
          cities:Object,
          letter:String
        },
        computed:{
          ...mapState({
            currentCity:'city'
          })
        },
        methods:{
          handleCityClick(city){
            this.changeCity(city)
            this.$router.push('/')
          },
          ...mapMutations(['changeCity'])
        },
        mounted() {
          this.scroll = new Bscroll(this.$refs.wrapper);
        },
        watch:{
          letter(){
            if (this.letter){
              const element = this.$refs[this.letter][0]
              this.scroll.scrollToElement(element)
            }
            console.log(this.letter);
          }
        }
    }
</script>

<style scoped lang="stylus">
  @import "../../../assets/styles/varibles.styl"
  .border-topbottom
    &:before
      border-color: #ccc
    &:after
      border-color: #ccc
  .border-bottom
    &:before
      border-color: #ccc
  .list
    overflow: hidden
    position: absolute
    top: 3rem
    left: 0
    right: 0
    bottom: 0
    .title
      line-height: .54rem
      background: #eee
      padding-left: .2rem
      color: #666
      font-size: .26rem
    .button-list
      overflow: hidden
      padding: .1rem .6rem .1rem .1rem
      .button-wrapper
        float: left
        width: 33.33%
        .button
          margin: .1rem
          padding: .1rem 0
          text-align: center
          border: .02rem solid #ccc
          border-radius: .06rem
    .item-list
      .item
        line-height: .76rem
        padding-left: .2rem
</style>
